Učinki obravnavanja z dušikom in medvrstnih razdalj na morfološke in fiziološke lastnosti buč (Cucurbita pepo L.)

Nastran HAMIDI, Hamid MOHAMMADI, Lamia VOJOUDI, Amirreza SADEGHI

Povzetek


Gojenje buč (Cucurbita pepo L.) kot zdravilnih rastlin je v zadnjem času splošno razširjeno v Iranu. Semena in pripravki iz njih se uporabljajo za zdravljenje različnih bolezni. Zaradi pomankanja informacij o vplivu medvrstnih razdalj setve in potrebah po hranilih na pridelek je bil izveden naključni faktorski poskus s tremi ponovitvami na Azarbaijan Shahid Madani University Research Field v letu 2013. Obravnavanja so obsegala 5 ravni gnojenja z ureo (0, 50, 100, 150, 200 kg N/ha), in 3 medvrstne razdalje setve (30, 60 in 90 cm). Rezultati kažejo, da so imela ta obravnavanja značilen učinek na nekatere morfološke znake kot so dolžina rastlin, število stranskih poganjkov in število listov na rastlino. Uporaba 200 kg N/ha je povečala višino rastlin, število stranskih poganjkov in število listov kot tudi suho maso listov predvsem zaradi podaljšane vegetativne faze rasti in zakasnjenja cvetenja in tvorbe plodov. 150 kg N/ha v kombinaciji s 60 cm medvrstno razdaljo setve je dalo največ ženskih cvetov, največ plodov, največjo maso svežih plodov in največjo maso suhih semen. Rezultati meritev nekaterih fizioloških parametrov so pokazali značilne učinke inteakcije obravnavanja z dušikom in medvrstne razdalje na vsebnost klorofila b v zadnji fazi cvetenja in na vsebnost klorofila a in karotenoidov na koncu rastne sezone. Največja vsebnost olja je bila zabeležena pri150 kg N/ha in 60 cm medvrstni razdalji setve. Na osnovi dobljenih rezultatov lahko zaključimo, da je za največji pridelek buč najprimernejše gnojenje s 150 kg N/ha in 60 cm medvrstna razdalja setve.

Ključne besede


Cucurbita pepo L., gnojenje z dušikom, medvrstna razdalja setve, pridelek, vsebnost olja

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2016.107.1.07

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